Housing enclosing paste container, having container-puncturing and destroying means, and paste extruder and outlet controller with common actuator



June 12, 1951 R. F. RAEDECKE 25 6.980

HOUSING ENCLOSING PASTE CONTAINER, HAVING CONTAINER-PUNCTURING ANDDESTROYING MEANS AND PASTE EXTRUDER AND OUTLET CONTROLLER WITH COMMONACTUATOR A Filed May 18, 1948 g' ROBERT F. RAEOEOKE. 4

Patented June 12, 1951 UNITED STATES PATENT OFFICE HOUSING ENCLOSINGPASTE CONTAINER, HAVING CONTAINEE-PUNCTURING AND DESTROYING MEANS, ANDPASTE EX- TRUDER AND OUTLET CONTROLLER, WITH COMMON ACTUATOR Robert F.Raedecke, Elgin, Ill.

Application May 18, 1948, Serial No. 27,670

8 Claims.

This invention relates to a dispenser for all kinds of pastes or plasticmaterials, and more particularly to a dispenser having a chamber fromwhich the plastic material is expelled through an opening in response toactuation of a trigger means.

It is common to supply plastic materials in collapsible tubes from whichthe material is squeezed for use. The dispensing of plastic materials inthis manner is attendant with inconvenience, unpleasant spillage andsmearing of the material, waste and the annoying necessity of replacingthe cap after each use to prevent drying of the material in the tube.There is also a vexatious tendency for some of the material to becometrapped in the end of the tube remote from the opening. It is,therefore, a general object of my invention to provide a device fromwhich paste may be dispensed for use without the above-mentioneddisadvantages and inconveniences.

It is also an object to provide a paste dispensing device which is neatand pleasing in appearance and which remains neat in use.

In pursuance of these and many other objects which will be apparent tothose skilled in the art, I provide a moulded casing or body having apaste cylinder therein and a piston reciprocable in the cylinder. Thepaste leaves the cylinder through an opening or nozzle in response tomovement of the piston. The piston is operated by means of a triggeracting through a force transmitting linkage. I also provide a valve inthe opening or nozzle, which valve is opened by the triggersimultaneously with the operation of the piston.

It is within the contemplation of this invention that the paste usedtherewith be supplied in disposable cartridges conforming in size to thepaste cylinder. The piston may act on the bottom of the cartridgecausing the bottom and the piston to slide through the cylindrical wallof the cartridge in the process of expelling the plastic and has alongitudinally-extending cy- 2 vention and showing the internalmechanism in elevation;

Figure 3 is a perspective View of the actuating mechanism removed fromthe body of the device and illustrating its construction and operation;

Figure 4 is a sectional view taken approximately on the line 44 ofFigure 2 looking in the direction of the arrows showing how the cams onthe trigger means act on the actuating tongs;

Figure 5 is a sectional view taken approximately on the line 55 ofFigure 2 looking in the direction of the arrows showing the dispositionof the tongs in the dispenser, and

Figure 6 is a sectional view taken approximately on the line 66 ofFigure 2 looking in the direction of the arrows showing how the cap isrelated with the body of the dispenser.

Referring now in greater detail to the drawings, a casing or body It] ispreferably of moulded lindrical cavity. The cavity is lined with ametallic cylinder ll open at the top end. An annular cap seat I2 isembedded in the top of the body and is provided with L-shapedbayonettype sockets I3. The cap seat [2 is receptive to a cap I4 havingbayonet prongs [5 which engage the sockets I3. The cap M is providedwith a conduit [6, part of which extends at I! down into the cylinderll. When the cap is in place, the conduit I6 is lined up with an openingor nozzle I8 in the body I.

A cartridge 20 filled with paste or plastic material is shown in placein the cylinder I I. When the cartridge 20 is placed in the cylinder andthe cap I4 is locked in place over it, the pointed part ll of conduit IEpierces the end 2i of the cartridge, thereby permitting the expulsion ofpaste out through the conduit l6 and nozzle [8. It will be noted thatthe lower cylindrical wall of the cartridge 2E5 is crimped over at 22 toretain the bottom member 23 of the cartridge.

A piston is freely reciprocable in the cylinder H and has an outsidediameter which is less than the inside diameter of the cartridge 25). Inthe use of the invention, the piston 38 acts against the bottom 23 ofcartridge 20, forcing the bottom 23 through the cartridge. The bottom 23therefore acts as a tightly fitting piston in expelling paste from thecartridge.

It will be noted that a piston spring 3| is disposed in compressionbetween the piston 39 and the bottom 32 of a cylindrical cavity. Tworack bars 35 are secured at one end to the sides of the piston 30.Cutting blades 31 are secured to,

rack bar 35.

and project from, the sides of piston 30. Complemental grooves 38 aredisposed in the wall of the cylinder II. A paste cartridge is insertedin the device by first removing cap l4, forcing the cartridge into thecylinder against the action of piston spring 3! and then replacing thecap [4.

An actuating ratchet assembly employed for the purpose of forcing thepiston against the contents of the cartridge 20 consists of tongs havingtwo legs pivotally-mounted on a pintle 4|. Pintle M is an extension of abearing block G2, having bearing pins 63 extending therefrom at rightangles with the pintle 4|. Bearing pins 43 are journaled in the body Illas shown to advantage in Figure 5. It is thus far apparent that thetongs are so mounted as to be free to open and close and also to rockafter the fashion of a seesaw. The work or pawl ends 44 of the tongs 4Bare disposed to engage and act on the The other ends 15 are disposed tobe acted upon by sliding cams forming a, part of the trigger member 56.One cam 5| is wedgeshaped and may be designated an opening cam becausethe wedge acts to open the tongs 4!]. A convergin cam 52 has an invertedV-shaped notch which acts upon the ends of the tongs causing them toconverge.

Trigger member 50, carrying the opening and converging cams, is slidablymounted within a cavity in the body ID. A trigger spring 54 is undercompression and tends to maintain the trigger in its normal position. Anelongated slide 55 is secured to the trigger member 55 and is disposedin a slot in the body It. The upper end 56 of the slide 55 is pointedand is normally positioned across the opening of nozzle l8. Slide 55reciprocates with the trigger member 59 and is operative as a valve toopen and close the nozzle I8. As shown in Figure 2, the slide valve isnormally in the closed position.

The operation of the device will now be described: The piston dispenseris clasped in the hand and the trigger is engaged by the index finger.As the trigger member is moved in a sliding motion from its normalposition, the converging cam 52 engages the ends 45 of the tongs,forcing them together. The work or pawl ends M of the tongs are therebyurged together and into engagement with the teeth of the rack bars 35.The converging cam 52 then acts to rotate the tongs All about the axisof bearing pins 43. In other Words, referring to the drawings, adownward movement of the trigger member 50 results in an upward movementof the work or pawl ends M of the tongs. This upward movement istransmitted through the rack bars to the piston 36. It is to be notedthat downward movement of trigger member 50 also results in an openin ofthe slide valve in nozzle I8.

When the trigger 50 is released, trigger spring 54 returns the triggerto its normal position. During the return stroke, the opening cam 5|opens the tongs 40, thereby disengaging the work or pawl ends 44 fromthe rack bars 35. The continued movement of the cam '5! causes the tongs4! to rotate on the axis of bearing pins 43 so that the work or pawlends 44 move down into position to engage the next pair of teeth on therack bars 35. The piston spring 3| sustains the piston 38 in positionand prevents its moving downwardly after the tongs have been disengagedfrom the ratches. It is thus apparent that each time the trigger member58 is moved from its normal position and allowed to return to its 4normal position, a measured quantity of paste is expelled from thecartridge 28.

As the piston 30 moves through the cartridge carrying the bottom 23 ofthe cartridge with it, the cutting blades 31 incise the cylindricalsides of the cartridge 20. When the piston 30 has moved to the top andall of the paste has been expelled from the cartridge, the cap I 4 isremoved. By reason of having been incised, the cylindrical walls of thecartridge 28 are readily removable from the cylinder I l. A newprefilled cartridge is inserted in the cylinder H and pressed in placeagainst the action of the piston spring 3!. The cap M is replaced inposition and the piston dispenser is again ready for use.

What I claim is:

I. In a device for dispensing a plastic material, a cylinder and apiston reciprocable therein, a rack bar connected to the piston, apawl-equipped tong pivotally mounted intermediate its ends on thecylinder, and a spring returned trigger memher having a cam projectiondisposed to act on one end of the tong to impart swinging and rockingmovement there to thereby causing the pawl end to engage the rack barand move the piston.

2. In a device for dispensing a plastic material, a cylinder and apiston reciprocable therein, a of rack bars connected to the piston,tongs pivotally mounted on the cylinder and having pawl ends engageablewith the rack bars, and a trigger member having a cam disposed to act onthe tongs to cause the pawl ends thereof to engage and move the rack barand piston.

3. In a device for dispensing a plastic material, a cylinder and apiston reciprocable therein, rack bars connected with the piston, tongspivotally mounted on the cylinder and having pawl ends movable into andout of engagement with the rack bars, and a trigger member having cammeans disposed to act on the tongs to cause them to engage and move therack bars and piston.

4. In a device for dispensing a plastic material, a cylinder and apiston reciprocable therein, a rack bar connected with the piston, apawlequipped tong pivotally mounted on the cylinder, the pawl of thetong being engageable with the rack bar, and a trigger member includinga cam assembly disposed to act on the tong to cause the pawl thereof toengage and move the rack bar and piston.

5. In a dispensing device, a casing for holding the commodity to bedispensed equipped with a discharge nozzle and a slide valve therefor;an ejector mechanism including a piston within the casing for forcingthe commodity toward and through said nozzle, pawl and ratchet meansconnected with the piston for intermittently advancing the piston in thedirection of the nozzle, a trigger slidably mounted on the casingdirectly connected with the slide valve and provided with camsoperatively engageable with the pawl portion of said pawl and ratchetmeans for swinging the pawl portion of said means into and out ofengagement with the ratchet portion of said pawl and means and also torock the pawl portion of said means when the same is in engagement withthe ratchet portion of said means whereby opening and closing of thevalve and progressive movement of the piston within the casing insynchronism are effected in response to movement of said trigger.

6. In a dispensing device, a casing for holding the commodity to bedispensed, and ejector mechanism including a piston within the casing,rack bars extending from the piston longitudinally of the casing,pivotally and rockably mounted pawls for successively engaging the teethof the rack bars and imparting intermittent movement to the piston, anda trigger mounted on the casing and provided with cam means engageablewith the pawls incidental to movement of the trigger for swinging thepawls into and on of engagement with the rack bars and to root: thepawls when the latter are engaged with the rack bars to advance thepiston.

7. In a dispensing device, a casing for holding a cartridge containingthe commodity to be dispensed, an ejector mechanism including a pistonWithin the casing and reciprocable in the cartridge for expelling thecontents thereof, knife blades on the piston operative to slit the cartridge as the piston moves therethrough, rack bars extendinglongitudinally from the piston, pivotally and rockably mounted tongshaving pawls for successively engaging the teeth of the rack bars, and atrigger mounted on the casing and provided with cams engageable with thetongs for swinging the pawls thereof into and out of engagement with therack bars and to rock the tongs when the pawls are in engagement withthe rack bars to advance the piston through the cartridge.

8. In a dispensing device, a casing for holding a cartridge containingthe commodity to be dispensed and equipped with a discharge nozzle and aslide valve therefor, ejector mechanism within the casing including apiston movable lengthwise through the cartridge for expelling thecontents thereof and. equiped with lateral knives for slitting thecartridge incidental to the dispensing action of the piston, and meanscon-- nected with the piston and with the slide valve for controllingthe opening and closing the latter in synchronism with the movement ofthe piston through the cartridge comprising rack bars ex tending fromthe piston, pivotally and rockably mounted pawls for successivelyengaging the teeth of the rack bars, and a trigger directly connectedwith the slide valve and provided with cam means engageable with thepawls for swinging the pawls into and out of engagement with the rackbars and to rock the pawls when the latter are engaged with the rackbars for advancing the piston as said trigger is actuated to effect amovement of the valve to open position.

ROBERT F. RAEDECKE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Sonneborne et a1. June 6, 1944

